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RE: And then again,

146.70.198.3

In Reply to: RE: And then again, posted by Triode_Kingdom on January 12, 2024 at 22:03:23

After an initial non-start with feedback as cathode degeneration (including cathode circuit use in RIAA filters) or global from the OT secondary (and those being the only forms I knew of at the time), I became interested again after reading some of Frank Blohbaum's ideas using 'nested' or local forms. Building some of his circuits confirmed there was positive potential there.

By the way: He gets that abundance of headroom you mention by making a transconductance amplifier at the input stage with a triode and BJT for 'abundantly' high gain (≥1000X ! ).

Any resistance to the subject of feedback I have now comes mostly from difficulty with the way it's talked about.
No matter how hard I try, I can only see the oft reproduced Crowhurst block diagram for series feedback as a parallel arrangement of some sort, and no-one so far has been able to explain it in a way that I can translate back into thinking that would be useful in designing tube circuits.

Last time at Barnes & Noble I scanned the shelves for "Feedback for Dummies" but apparently they were sold out. : )

Follow Ups:

RE: And then again, - Best audiotransformers 11:33:51 01/17/24 (1)
What does your comment have to do with this topic?

Edits: 01/17/24
- RE: And then again, - Ian L 18:01:44 01/17/24 (0)
  Well, it's on topic in as much as the general underlying theme of these forums is friendly discussion of our audio related interests.
  
  The OP (Original Poster/ Thread Starter) has to all intents and purposes abandoned this thread, leaving it open to the flow of discussion between those of us who have become acquainted with each other (or our monikers at least) over the years, much like the wandering flow of any friendly conversation.
  
  Because of the way the Asylum is set up (ie. not locking positions of posts in chronological order), the OP is always free to come and post again above this if he wants to steer some discussion back along the lines of his own original interest.
  
  Thanks

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